TS62538@IEC:2008(E) - 6 - Annex A (informative) Categorization criteria The following guidance criteria were established for the definitions of optical dynamic, active andpassive devices: a) Three groups of devices only, namely dynamic, active and passive, are to be identified. (q These three groups should be ranked in the following order: 1. Dynamic, 2.Active, 3. Passive (that is, all devices exhibiting dynamic characteristics are dynamic; among the other ones, all those exhibiting active characteristics are active; the remaining ones are passive) c) As an exception to the previous criterion,passive devices may containphotodiodes (which per se are active)for monitoring purposes, continuing to be regarded as passive. NSE D1 (p Dynamic devices shall be mainly characterized by the possibility to change some of their characteristics with time, finalized to keep or improve defined performances of the system in which they are intended to be inserted. e) Active devices shall be mainly characterized by either i) optical generation or detection signal e/o or o/e conversion, in ii) optical amplification orregeneration, iv)wavelength conversion. f) passive devices shall be mainly characterized by their not needing external power, except to stabilize their own characteristics. GASUR NOTE1 Criterion a) is according to a requirement from TC 86. NoTE 2 Criterion b) introduces the concept of ranking among the different categories. This concept greatly helps to categorize those devices simultaneously.exhibiting more than one single characteristic (the most critical case), NOTE3 Criterion c), an exception to criterion b), is needed for those passive devices that include photodiodes (which are active) merely for monitoring purposes, necessary to stabilize their characteristics. NOTE 4 Criteria d) to f) indicate the characterizing aspects of each category. - 10 - TS62538@IEC:2008(E) Annex B (informative) Allocation of optical devices by categories and working groups Representative (but not exhaustive) lists of optical devices standardized or under study by the working groups of TC86 subcommittees mainly involved in the categorization effort, namely 86B-WG7, 86C-WG3,86C-WG4 and SC86C-WG5,are reported in Table 1.They are allotted in the table both by working groups and device categories (as defined in Clause 1). NOTE The allocation of devices among the working groups reflects the situation at the time of publication of this technical specification. Successive changes might be possible in principle. Table A.1 - Allocation of optical devices by categories and working groups Dynamic Active Passive Optical passive devices: Wavelength selective AMES branching devices, Fixed optical attenuators,Variable 86B-WG7 optical attenuators,Optical isolators,Optical switches and blockers,WDM devices, Optical circulators,Optical filters, Tunable optical filters, Optical branching devices, Chromatic dispersion compensators, Polarization controllers 86C-WG3 Optical amplifiers: Rare-earth doped-fibre ASUPI amplifier, Semiconductor optical amplifiers, Fibre Raman amplifiers,Optical waveguide amplifiers, Optical amplifiers for digital applications, Optical amplifiers for multichannel applications Optical sources and detectors: Semiconductor Lasers, VCSELs,LEDs,Tunable laser diodes, Mode-lock and external cavity laser diodes, Fibre lasers; APD. PIN and PIN-FET photodetectors,MSM photodetectors 86C-WG4 E/O and O/E signal converters: optical transmitters, receivers and transceivers. Modulator integrated transmitters; Single fibre bi-directional module, Optical Triplexers, Transmitterand receiveroptical sub-assemblies; Electro-absorption, lithium niobate and semiconductor Mach-Zehnder modulators; EO switches Wavelength converters:Transponders, Semiconductor and lithium niobate nonlinear effect-based converters Dynamic devices: Dynamic channel equalizers, Dynamic WG5 chromatic dispersion compensators,Dynamic tilt 86C-1 equalizers, Polarization mode dispersion compensators,